A cactus (plural cacti) belongs to the plant family Cactaceae which comprises of about 127 genera with nearly 1750 known species of the order Caryophyllales. The word "cactus" is derived from Latin and from the Ancient Greek , kaktos which is a name that was originally used by Theophrastus for a spiny plant whose identity is not certain. Cacti can be found in a wide range of shapes and sizes. Most cacti live in habitats that are subjected to at least some drought. Many live in extremely dry environments such as the Atacama Desert which is one of the driest places on earth. Cacti exhibit many adaptations to conserve water. Almost all cacti are succulents which means that they have thickened, fleshy parts adapted to store water. The stem is the only part of most cacti where this vital process takes place, unlike many other succulents. Most species of cacti retain only spines which are highly modified leaves as they have already lost their true leaves. Spines help prevent water loss by reducing air flow close to the cactus and providing some shade as well as defending themselves against herbivores. Enlarged stems carry out photosynthesis in the absence of leaves. Cacti are native to the Americas and range throughout Patagonia in the south to parts of western Canada in the north, except for Rhipsalis baccifera, which also grows in Africa and Sri Lanka.

In this sub category you can download free PNG images: Cactus Nature. In this category "Cactus" we have 79 free PNG images with transparent background.

  • Vector Plant Prickly Cactus Free PNG HQ PNG Image
    Vector Plant Prickly Cactus Free PNG HQ
    Format: PNG
    Resolution: 512x512
    Size: 11.6KB
    Downloads: 82
  • Vector Plant Prickly Cactus Free HD Image PNG Image
    Vector Plant Prickly Cactus Free HD Image
    Format: PNG
    Resolution: 512x512
    Size: 285.6KB
    Downloads: 72
  • Vector Photos Plant Prickly Cactus PNG Image
    Vector Photos Plant Prickly Cactus
    Format: PNG
    Resolution: 720x1118
    Size: 361.9KB
    Downloads: 46
  • Vector Plant Prickly Cactus HD Image Free PNG Image
    Vector Plant Prickly Cactus HD Image Free
    Format: PNG
    Resolution: 512x512
    Size: 490.9KB
    Downloads: 52
  • Vector Plant Prickly Cactus Free HQ Image PNG Image
    Vector Plant Prickly Cactus Free HQ Image
    Format: PNG
    Resolution: 600x600
    Size: 167.4KB
    Downloads: 48
  • Tropical Plant Cactus Vector Free Photo PNG Image
    Tropical Plant Cactus Vector Free Photo
    Format: PNG
    Resolution: 2235x3197
    Size: 221.0KB
    Downloads: 79
  • Tropical Plant Cactus Vector Free PNG HQ PNG Image
    Tropical Plant Cactus Vector Free PNG HQ
    Format: PNG
    Resolution: 831x935
    Size: 54.7KB
    Downloads: 70
  • Tropical Plant Cactus Vector Free Transparent Image HD PNG Image
    Tropical Plant Cactus Vector Free Transparent Image HD
    Format: PNG
    Resolution: 1024x780
    Size: 614.8KB
    Downloads: 84
  • Tropical Photos Plant Cactus Vector PNG Image
    Tropical Photos Plant Cactus Vector
    Format: PNG
    Resolution: 512x512
    Size: 21.6KB
    Downloads: 44
  • Tropical Plant Cactus Vector Free HQ Image PNG Image
    Tropical Plant Cactus Vector Free HQ Image
    Format: PNG
    Resolution: 2270x2811
    Size: 139.6KB
    Downloads: 62
  • Tropical Plant Cactus Vector HQ Image Free PNG Image
    Tropical Plant Cactus Vector HQ Image Free
    Format: PNG
    Resolution: 1142x2000
    Size: 338.5KB
    Downloads: 52
  • Prickle African Free Download PNG HD PNG Image
    Prickle African Free Download PNG HD
    Format: PNG
    Resolution: 986x653
    Size: 71.0KB
    Downloads: 44
  • Prickle African HD Image Free PNG Image
    Prickle African HD Image Free
    Format: PNG
    Resolution: 512x512
    Size: 18.8KB
    Downloads: 79
  • Prickle African PNG Download Free PNG Image
    Prickle African PNG Download Free
    Format: PNG
    Resolution: 789x720
    Size: 258.1KB
    Downloads: 83
  • Photos Prickle African Free Download PNG HQ PNG Image
    Photos Prickle African Free Download PNG HQ
    Format: PNG
    Resolution: 512x512
    Size: 26.1KB
    Downloads: 72
  • Prickle Pic African Download HD PNG Image
    Prickle Pic African Download HD
    Format: PNG
    Resolution: 660x500
    Size: 21.3KB
    Downloads: 68
  • Prickle African Free Transparent Image HQ PNG Image
    Prickle African Free Transparent Image HQ
    Format: PNG
    Resolution: 2942x2171
    Size: 3.4MB
    Downloads: 71
  • Prickle African PNG Image High Quality PNG Image
    Prickle African PNG Image High Quality
    Format: PNG
    Resolution: 700x490
    Size: 41.4KB
    Downloads: 64
  • Prickle African Download HD PNG Image
    Prickle African Download HD
    Format: PNG
    Resolution: 1207x1196
    Size: 1.0MB
    Downloads: 72
  • Cactus Prickle Free Download PNG HQ PNG Image
    Cactus Prickle Free Download PNG HQ
    Format: PNG
    Resolution: 1070x1918
    Size: 2.6MB
    Downloads: 98

RELATED CATEGORIES

Plants PNG Category

Plants

Wood PNG Category

Wood

Vegetable PNG Category

Vegetable

Chamomile PNG Category

Chamomile

Wood PNG Category

Wood

Wood PNG Category

Wood

Wood PNG Category

Wood

Desert PNG Category

Desert

Clover PNG Category

Clover